It just means that the price of an individual stock is too high for the average investor to be able to purchase it. AMZN closed today at $2,782.94. If they did

It just means that the price of an individual stock is too high for the average investor to be able to purchase it. AMZN closed today at $2,782.94. If they did a 20:1 split today, that means if you owned 1 share @ $2,782.94, when you wake up in the morning you would now own 20 shares @ $139.14 (20x the shares @ 1/20th the original price). It can lead to a slight bump in stock price because it's easier for average folks to buy a $139.14 share than a $2,782.94 share. More demand -> prices go up. However, macro conditions like the US economy, world news, or news that affects the business directly are probably going to have a greater impact on price than a stock split.